Respuesta :
$ you have will be represented by y
$ your friend has will be f
The amount of weeks you save up for will be w
y=55+10w
f=20+15w
now set them equal to each other
55+10w=20+15w
Move all variables to one side and all constants to the other
55-20=15w-10w
combine like terms
35=5w
isolate the variable
35/5=w
combine like terms
7=w
it will take 7 weeks
$ your friend has will be f
The amount of weeks you save up for will be w
y=55+10w
f=20+15w
now set them equal to each other
55+10w=20+15w
Move all variables to one side and all constants to the other
55-20=15w-10w
combine like terms
35=5w
isolate the variable
35/5=w
combine like terms
7=w
it will take 7 weeks
Answer:
7 weeks
Explanation:
Let w = the number of weeks.
Let A(w) = the amount of money saved after w weeks.
The amount saved A(w) is the starting amount plus weekly savings.
A(w) = 55 + 10w
A(w) = 20 + 15w
Graph the equations on the same coordinate plane.
The lines intersect at (7, 125). After 7 weeks, you and your friend will have the same amount, $125, in your accounts.
